The CommLink FXC-S201 is a fiber optic transceiver system that carries two intercom channels seamlessly over a single strand or dual strands of fiber spanning distances of more than 30 kilometers (18.6 miles). The system works with the industry's most common 2-Wire partyline intercom systems, as well as most digital matrix-style 4-Wire intercom systems. All functionality of each intercom system is transported over the fiber link, including call signaling, matrix panel alphanumeric data and remote station controls. With advanced digital noise elimination circuitry, users won't know that they aren't connected by traditional copper wires.